The book discusses in detail the settings of network services that allow you to create a server with the required configuration and functionality based on the Linux OS. You can configure any type of server: from a local network server to an Internet server and a remote access server. Linux administration is described in detail. The presentation of the material is based on the Red Hat and Mandrake distributions. A lot of unique information: running Windows games under Linux and creating a Linux server for a gaming room, setting up Dr. antiviruses. Web and AVP for Linux, traffic accounting program MRTG, security and attack detection system LIDS, and much more. Particular attention is paid to the security of Linux servers. The Linux OS itself is described in sufficient detail and a reference book of its commands is provided. After reading the book, you will become knowledgeable about configuring and compiling the kernel, creating your own rpm packages, the bash command interpreter, and using RAID arrays. You will get to know the inner world of Linux. The book is suitable for both professional and novice administrators, since the presentation of the material begins with installing the Linux OS, and the first chapter provides a description of the basic network technologies and protocols (Young Administrator Course). All listings given in the book have been tested in practice and are posted on the attached CD. In addition, it contains a lot of reference information (HOWTO, RFC), as well as articles on Linux. There is a rich set of auxiliary utilities and software for the server (Apache, MySQL, MRTG, etc.).